Drawing routine/animation help

[The Reaver of Darkness]

Hallucinoid and Xarquid are both 2x2 constantly animated. Cyberdisc is 2x2 partially constantly animated. Biodrone is 1x1 partially constantly animated. Silacoid is 1x1 and constantly animated but has no difference in appearance depending what direction it is facing. I think Biodrone and Hallucinoid also look the same in all directions. Xarquid shows the direction it's facing.